This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A158360 #8 Sep 27 2018 17:56:22 %S A158360 0,-2,0,0,0,-6,0,6,0,-6,0,0,0,-6,0,12,0,-12,0,0,0,-6,0,18,0,-6,0,0,0, %T A158360 -18,0,18,0,-6,0,0,0,-6,0,18,0,-18,0,0,0,-6,0,36,0,-12,0,0,0,-20,0,18, %U A158360 0,-6,0,0,0,-6,0,24,0,-18,0,0,0,-18,0,36,0,-6,0,0,0,-18,0,36,0,-6,0,0,0,-6,0 %N A158360 a(n) = A145511(n) - A145501(n). %H A158360 Antti Karttunen, <a href="/A158360/b158360.txt">Table of n, a(n) for n = 1..65537</a> %o A158360 (PARI) %o A158360 up_to = 65537; %o A158360 t1 = direuler(p=2, up_to, 1/(1-X)^3); %o A158360 t2 = direuler(p=2, 2, 1+1*X^2+4*X^4, up_to); %o A158360 t3 = direuler(p=2, 2, 1-2*X^1+7*X^2, up_to); %o A158360 v145501 = dirmul(t1, t2); %o A158360 v145511 = dirmul(t1, t3); %o A158360 A158360(n) = (v145511[n] - v145501[n]); \\ (after code in A145501 and A145511) - _Antti Karttunen_, Sep 27 2018 %Y A158360 Cf. A145444, A145501, A145511, A158327, A158801. %K A158360 sign %O A158360 1,2 %A A158360 _Paul Curtz_, Mar 17 2009 %E A158360 Edited and extended by _R. J. Mathar_, Apr 08 2009